#!/usr/bin/env python3
# passphrase validity checker. see file `notes` for details
# only strings with NO DUPLICATE words are valid

if __name__ == '__main__':
    total_valid = 0

    def check_for_duplicates(list):
        has_duplicate = False
        for i in range(1, len(list)):
            for j in range(i):
                if list[i] == list[j]:
                    has_duplicate = True
        return has_duplicate

    with open("input", "r", encoding="utf-8") as passphrase_input:
        for passphrase in passphrase_input:
            is_valid = False
            passwords = passphrase.split()
            is_valid = not check_for_duplicates(passwords)
            if is_valid:
                total_valid += 1
    print(total_valid)